Home / 20,912.29-28,861.26-11,960.63

Finding the Fourth Proportional to 20,912.29, 28,861.26 and 11,960.63

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Solution

The fourth proportional to 20,912.29, 28,861.26 and 11,960.63 is: 16,506.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.29 : 28,861.26 = 11,960.63 : x
  2. Step 2: Convert to fraction form
    20,912.29/28,861.26 = 11,960.63/x
  3. Step 3: Cross multiply
    20,912.29x = 28,861.26 × 11,960.63
  4. Step 4: Simplify right side
    20,912.29x = 345,198,792.39
  5. Step 5: Solve for x
    x = 345,198,792.39/20,912.29
  6. Step 6: Final answer
    x = 16,506.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.